Airbag control unit with part number KT1T-14B321-DD

What does the airbag control unit KT1T-14B321-DD do?

At Ford the airbag control unit KT1T-14B321-DD controls the restraint system (SRS). From the signals of the impact sensors it calculates, within fractions of a second, which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

Monitoring runs without interruption during operation, and faults appear via the airbag warning light.

In detail, the sensors, the wiring and the firing circuits belong to the monitored areas.

Why does the control unit KT1T-14B321-DD fail?

The most common cause of the KT1T-14B321-DD failing is crash data stored after an accident, even if no airbag fired. An ordinary diagnostic tool cannot erase this data. Further causes include ageing components, moisture and corrosion at plug connections, cold solder joints and voltage spikes.

The crash data sits in the memory of the unit and is erased by Airbag24 during the repair.

Voltage spikes, for example with a weak battery or a jump start, act on the electronics. Ageing and moisture, on the other hand, mainly affect the components themselves.

How can you tell that the KT1T-14B321-DD is defective?

The airbag warning light lights up permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared. In a crash, airbags and seatbelt pretensioners may then fail to fire.

These signs point to a defect that must be checked.

Which vehicles is the KT1T-14B321-DD fitted in?

The control unit KT1T-14B321-DD is fitted at Ford in this model: Ford Transit 7 ’14 (from 2014).

The vehicle list recorded so far follows here.

• Ford Transit 7 ’14 (from 2014)

Comparing the part number on the label of the removed unit with this page makes sure you have the correct unit. It is better to have the fault memory read out beforehand, because only that log shows whether the control unit is defective or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers BK2T-14B321-BF, BK3T-14B321-AC, DT1T-14B321-DF, KT1T-14B321-KD, LK4Z-14B321-C, LK4Z-14B321-E.

How does the repair of the KT1T-14B321-DD work?

First read out the fault memory and enclose the log; then disconnect the battery and remove the control unit KT1T-14B321-DD. Next create a repair order online and send the unit off packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit, replaces defective components and erases the crash data. At the end comes a functional test and the return of your own unit.

The time stated refers only to checking, repairing and testing at Airbag24. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit KT1T-14B321-DD get to Airbag24?

The control unit KT1T-14B321-DD reaches Airbag24 by parcel, or you book a UPS collection for an extra charge. UPS handles the return journey after the repair.

The printed repair order goes into the parcel, and the unit is packed shockproof.